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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f024231f20aa9fb0b7e5b884476015b9fa4eb15008a0f4fa096d7c56445af5a' 
  AND token = 'J+vQomK+l7S0qIxAIUGtimUdfbA8K6jQEIGTil497Z8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}